Quality Assessment of Ojeok-San, a Traditional Herbal Formula, Using High-Performance Liquid Chromatography Combined with Chemometric Analysis

Figure 1

Chemical structures of 19 marker compounds in Ojeok-san (OJS). (1) Gallic acid, (2) protocatechuic acid, (3) chlorogenic acid, (4) albiflorin, (5) paeoniflorin, (6) ferulic acid, (7) liquiritin, (8) benzoic acid, (9) nodakenin, (10) hesperidin, (11) naringin, (12) neohesperidin, (13) ononin, (14) oxypeucedanin hydrate, (15) cinnamic acid, (16) byakangelicin, (17) cinnamaldehyde, (18) benzoylpaeoniflorin, and (19) glycyrrhizin.